ketone group
Noun: A ketone group is the characteristic functional group in organic chemistry consisting of a carbonyl group (a carbon atom double-bonded to an oxygen atom, C=O) where the carbon atom is also bonded to two other carbon atoms. This specific arrangement defines the structure of ketone compounds.
The term "ketone group" is used to identify the core structural feature that gives ketones their chemical properties. It is a precise term used in chemical nomenclature and descriptions. * The presence of a ketone group is what distinguishes a ketone from other carbonyl compounds like aldehydes or carboxylic acids. * In the molecule acetone, the central carbon of the ketone group is bonded to two methyl groups.
- In spectroscopic analysis, the ketone group produces a distinctive signal, such as a strong absorption band around 1700-1725 cm⁻¹ in infrared (IR) spectroscopy.
- The reactivity of the ketone group, particularly the electrophilicity of the carbonyl carbon, is central to many organic synthesis reactions like nucleophilic addition.
- Carbonyl Group (n): The more general term for the C=O functional group. A ketone group is a specific type of carbonyl group.
- Ketone (n): The class of organic compounds that contain a ketone group.
- Ketonic (adj): Relating to or characteristic of a ketone or the ketone group.
- Carbonyl functionality (in the specific ketonic context): This is a more general synonym but can be used when the context makes it clear the carbonyl is of the ketone type (i.e., bonded to two carbons).
The term "ketone group" has a single, specific meaning in chemistry. It does not have other common definitions outside this scientific context.
- a group having the characteristic properties of ketones